yS SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 60 



Pulse rate during rst minute, 98; 2d minute, 90; 4th minute, 84; 5th minute, 

 80. 



CO2 let into chamber from bag outside. Fans put on to thoroughly mix 

 atmosphere of chamber ; then the fans were put off. Sample taken. Analysis : 

 CO2 3.52 per cent ; O2 18.5 per cent. 



Series II. C0 2 on and fans off. 



Average volume breathed, 42.6 liters per minute. Average tidal air, 2,247.48 cc. 

 Pulse rate during 1st minute, 118; 2d minute, 108; 3d minute, 104; 4th min- 

 ute, 96 ; 6th minute, 96. 



Water cooler put on for half an hour. 



Series III. C0 2 on. Air of chamber cooled n° to 13 F. (wet bulb). 



Average volume breathed, 44 liters per minute. Average tidal air, 2,584.6 cc. 



Pulse rate during 1st minute, 108; 2d minute, 96; 3d minute, 92; 4th minute, 

 92; 5th minute, 88. 



Sample taken. Analysis : COj 4.63 per cent; 2 17.50 per cent. 



August 19, 1911. Series I. H. B. W. lifted weight 12 times per minute 

 for series of 5 minutes. C(X> off and fans on. 



Average volume breathed, 23 liters per minute. 



